Počet záznamů: 1  

Investigation of metal-matrix composite containing liquid-phase dispersion

  1. 1.
    0385160 - ÚJF 2013 RIV GB eng J - Článek v odborném periodiku
    Strunz, Pavel - Mukherji, D. - Gilles, R. - Geue, T. - Rösler, J.
    Investigation of metal-matrix composite containing liquid-phase dispersion.
    Journal of Physics: Conference Series. Roč. 340, 012098 (2012), s. 1-15. ISSN 1742-6588. E-ISSN 1742-6596.
    [5th European Conference on Neutron Scattering. Praha, 17.07.2011-21.07.2011]
    Grant CEP: GA MPO FR-TI1/378
    Grant ostatní: European Commission(XE) RII3-CT-2003-505925
    Program: FP6
    Institucionální podpora: RVO:61389005
    Klíčová slova: metal-matrix composite * liquid-phase dispersion * strengthening * neutron diffraction
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    http://iopscience.iop.org/1742-6596/340/1/012098

    Al-Pb binary system is a suitable model system for testing liquid phase dispersion strengthening in bulk materials for structural applications. Liquid Pb islands can be finely dispersed in still solid Al matrix due to the substantial difference of melting points. The Al-Pb system prepared by means of Equal Channel Angular Pressing (ECAP) process was investigated by Small-Angle Neutron Scattering technique (SANS) which enables in-situ measurement of size and morphology parameters of Pb inclusions at elevated temperatures. It was observed that the lead particles were elongated roughly in the direction of ECAP. During the subsequent in-situ thermal cycle RT-400 C-RT, the elongated Pb particles transformed to nearly spherical shape. The change of scattering contrast during melting of Pb mapped the transform of the confined lead particles to the liquid phase. The center of the transition region is around 342 degrees C (615K) for both the as-cast and the ECAP deformed samples, which is a significant shift with respect to the free Pb melting point 327 degrees C (600K). For the ECAP sample, the transition is not sharp, indicating a broad size distribution of lead particles.
    Trvalý link: http://hdl.handle.net/11104/0215196

     
     
Počet záznamů: 1  

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